From SuperSU app, choose full unroot.

Becareful NOT to update SuperSU when prompted to.

Still unable to unroot. Am j missing something?

This is an old box. My question is you inherited it recently ? Or you installed a new ROM ?

You can install terminal app and then run it, and then type 'su'. To see if there is root or it is false detection by the root detect app.

It shows I do not have root access. May be is false detection by root detect app. Anyway can resolve this?

Anybody still using this box? Im still using this box...5 years already...still in good working condition..put coiling fan and it running without any problem..

I sold it off already

So what kind of box u using now?

Shield tv pro and Google chromecast 4K